NAOC Open IR
Cosmological neutrino simulations at extreme scale
Emberson J D1; Yu Haoran2; Inman Derek1; Zhang Tongjie3; Pen Ueli1; Harnoisderaps Joachim4; Yuan Shuo2; Teng Huanyu3; Zhu Hongming5; Chen Xuelei5; Xing Zhizhong6
2017
Source PublicationResearch in Astronomy and Astrophysics
ISSN1674-4527
Volume17Issue:8
AbstractConstraining neutrino mass remains an elusive challenge in modern physics. Precision measurements are expected from several upcoming cosmological probes of large-scale structure. Achieving this goal relies on an equal level of precision from theoretical predictions of neutrino clustering. Numerical simulations of the non-linear evolution of cold dark matter and neutrinos play a pivotal role in this process. We incorporate neutrinos into the cosmological N-body code CUBEP3M and discuss the challenges associated with pushing to the extreme scales demanded by the neutrino problem. We highlight code optimizations made to exploit modern high performance computing architectures and present a novel method of data compression that reduces the phase-space particle footprint from 24 bytes in single precision to roughly 9 bytes. We scale the neutrino problem to the Tianhe-2 supercomputer and provide details of our production run, named TianNu, which uses 86% of the machine (13 824 compute nodes). With a total of 2.97 trillion particles, TianNu is currently the world's largest cosmological N body simulation and improves upon previous neutrino simulations by two orders of magnitude in scale. We finish with a discussion of the unanticipated computational challenges that were encountered during the TianNu runtime.
Language英语
Funding Project[National Science and Engineering Research Council of Canada] ; [U.S. Department of Energy] ; [China Postdoctoral Science Foundation] ; [European Commission under a Marie-Sklodwoska-Curie European Fellowship (EU project)] ; [MoST 863 program] ; [NSFC grant] ; [CAS grant] ; [National Natural Science Foundation of China] ; [National Basic Research Program of China (973 program)] ; [Fundamental Research Funds for the Central Universities] ; [Canada Foundation for Innovation under Compute Canada] ; [Government of Ontario] ; [Ontario Research Fund Research Excellence] ; [University of Toronto] ; [National Science and Engineering Research Council of Canada] ; [U.S. Department of Energy] ; [China Postdoctoral Science Foundation] ; [European Commission under a Marie-Sklodwoska-Curie European Fellowship (EU project)] ; [MoST 863 program] ; [NSFC grant] ; [CAS grant] ; [National Natural Science Foundation of China] ; [National Basic Research Program of China (973 program)] ; [Fundamental Research Funds for the Central Universities] ; [Canada Foundation for Innovation under Compute Canada] ; [Government of Ontario] ; [Ontario Research Fund Research Excellence] ; [University of Toronto]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/37308
Collection中国科学院国家天文台
Affiliation1.多伦多大学
2.北京大学
3.北京师范大学
4.Department of Physics & Astronomy,University of British Columbia
5.中国科学院国家天文台
6.中国科学院大学
Recommended Citation
GB/T 7714
Emberson J D,Yu Haoran,Inman Derek,et al. Cosmological neutrino simulations at extreme scale[J]. Research in Astronomy and Astrophysics,2017,17(8).
APA Emberson J D.,Yu Haoran.,Inman Derek.,Zhang Tongjie.,Pen Ueli.,...&Xing Zhizhong.(2017).Cosmological neutrino simulations at extreme scale.Research in Astronomy and Astrophysics,17(8).
MLA Emberson J D,et al."Cosmological neutrino simulations at extreme scale".Research in Astronomy and Astrophysics 17.8(2017).
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